Add details how to fix the Licensify VPN
Add details how to fix the Licensify VPN

One fix for the Licensify VPN is to switch it off and on.

In this PR, we describe the process so that people on support
know this potential fix.

alphagov/govuk-developer-docs,alphagov/govuk-developer-docs,alphagov/govuk-developer-docs,alphagov/govuk-developer-docs